Method for detecting ambient brightness, method for saving electricity and display device using method for saving electricity

A technology for detecting the environment and display devices, which is applied in the field of visual persistence image display devices, methods for detecting ambient brightness, power saving methods and display devices using the same, can solve the problems of non-standard photoresistors and expensive prices, and achieve Power consumption saving and cost saving effect

Inactive Publication Date: 2013-05-15
GENERALPLUS TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, photoresistors containing sulfide barrier (CdS) or cadmium selenide (CdSe) obviously do not meet the specifications of various countries.
In addition, although manufacturers of photoresistors have proposed cadmium-free photoresistors, their prices are relatively expensive.

Method used

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  • Method for detecting ambient brightness, method for saving electricity and display device using method for saving electricity
  • Method for detecting ambient brightness, method for saving electricity and display device using method for saving electricity
  • Method for detecting ambient brightness, method for saving electricity and display device using method for saving electricity

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Embodiment Construction

[0033] In order to make the above and other objects, features and advantages of the present invention more comprehensible, preferred embodiments will be described in detail below together with the accompanying drawings.

[0034] image 3 It is a circuit diagram of a display device according to an embodiment of the present invention. Please refer to image 3 , the display device includes an input device 301 , a panel 302 , a light emitting diode 303 and a control circuit 304 . The input device 301 is, for example, a button. The control circuit 304 is coupled to the input device 301 , the panel 302 and the LED 303 . In this embodiment, it is assumed that the display device is a digital photo frame, the input device 301 is a button, and the panel 302 is a liquid crystal display panel. When the user operates the display device through the input device 301 , the control circuit 304 controls the LED to emit light. That is to say, every time the user presses the button 301 , the...

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Abstract

The invention provides a method for detecting ambient brightness, a method for saving energy and a device using the method for saving energy. The method for detecting ambient brightness comprises the following steps of: providing a light emitting diode; providing a first voltage for the first end of the light emitting diode and providing a second voltage for the second end of the light emitting diode, wherein the light emitting diode shows reverse bias; setting the second end of the light emitting diode in a high impedance status; and determining the ambient brightness according to the variation of the second end of the light emitting diode relative to time.

Description

technical field [0001] The present invention relates to a technology related to light-emitting diodes, and in particular to a persistent visual image display device and its scanning method, specifically to a method for detecting ambient brightness, a power-saving method and its use display device. Background technique [0002] Since the industrial revolution, human beings have used fossil fuels, deforestation, carbon compounds containing chlorine and fluorine, and intense agricultural and industrial activities, resulting in carbon dioxide, methane, nitrous oxide, chlorofluorocarbons, sulfur hexafluoride ( SF6), perfluorocarbons (PFCs), hydrofluorocarbons (HFCs) and other gases that easily absorb long-wave radiation (that is, "greenhouse gas (Greenhouse Gas, GHG)") have increased significantly, forming the phenomenon of global warming and causing the earth's "greenhouse effect" occurs. As global warming may endanger and lead to extreme abnormalities in the earth's climate, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J1/10G09G3/34
Inventor 廖栋才罗立声
Owner GENERALPLUS TECH INC
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